* "Seelkadoom" is a fictional concept: The term "Seelkadoom" is not officially associated with Sega or any of their existing franchises. It might be a fan-created term or a personal invention.
* Sega's plans are confidential: Game developers keep their future plans under wraps. They wouldn't publicly reveal ideas that might not come to fruition.
* Games are constantly evolving: The gaming landscape changes rapidly. Sega might have a project in the works that incorporates a similar concept without using the specific term "Seelkadoom."
To summarize: While it's fun to speculate, there's no way to know if Sega will ever use "Seelkadoom" in one of their games.
If you're interested in seeing "Seelkadoom" in a game, you could try creating your own game using game development software or sharing the idea with the gaming community. Who knows, it might inspire others to create something amazing!